* {
    box-sizing: border-box;
    font-family: 'Muli', sans-serif;
}
body>h1{
    text-align: center;
    color: blue;
}
body {
    background: url(../images/5.jpg);
    background-size: cover;
}
#container {
    width: auto;
    height: auto;
    margin-top: 120px;
    perspective: 800px;
    text-align: center;
}
#container h1 {
    color: #ECF6CE;
    margin-bottom: 30px;
}
#container > hr {
    border: none;
    border: 1px solid #fff;
    width: 80%;
}
.card {
    margin: 70px;
    display: inline-block;
    position: relative;
    width: 220px;
    height: 260px;
    opacity: 0.85;
}
.headr{
      margin-left: 670px;
      font-weight: bold;
      font-size: 30px;
      color: #1EBFA2;
      letter-spacing: 10px;
}
.front,
.back {
    width: 100%;
    height: 100%;
    position: absolute;
    backface-visibility: hidden;
    transition: transform 300ms;
    transition-timing-function: linear;
    border-radius: 5px;
}
.front {
    tranform: rotateY(0deg);
    background: url(../images/21.jpg);
    text-align: center;
    padding: 30px;

}
.back {
    background: url(../images/5.jpg);
    transform: rotateY(180deg);
    padding: 40px 15px;
    color: #1EBFA2;
    font-size: 20px;
    font-family: "微软雅黑";
    font-weight: bold;
}
.card:hover .front {
    transform: rotateY(-180deg);
    animation: liuguang 6s linear infinite;

}
.card:hover .back {
    transform: rotateY(0deg);
}
.front .contact {
    height: 120px;
    width: 120px;
    border: 5px solid #B2DBBF;
    border-radius: 50%;
    display: inline-block;
    margin-bottom: 10px;
}
.front .name {
    display: inline-block;
    font-size: 18px;
    color: #fff;
}
.front .job {
    color: #fff;
}
.front hr {
    border: none;
    color: #5CE2C9;
    border: 1px solid;
}
.back .icon  {
    fill: currentColor;
    color: inherit;
    height: 33px;
    width: 33px;
    margin-top: 15px;
    color: white;
}
.back .icon:hover {
    cursor: pointer;
    color: #648767;
}